Pith Number

pith:QV4JRSEF

pith:2010:QV4JRSEFHMXEKBHXKUFCPARNVE

not attested not anchored not stored refs pending

Through the Looking Glass: Why the "Cosmic Horizon" is not a horizon

Geraint F. Lewis, Juliana Kwan, Pim van Oirschot

arxiv:1001.4795 v1 · 2010-01-26 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QV4JRSEFHMXEKBHXKUFCPARNVE}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:09:29.554170Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

857898c8853b2e4504f7550a27822da9171115d50e2b8980fe3e9ed962ee118f

Aliases

arxiv: 1001.4795 · arxiv_version: 1001.4795v1 · doi: 10.48550/arxiv.1001.4795 · pith_short_12: QV4JRSEFHMXE · pith_short_16: QV4JRSEFHMXEKBHX · pith_short_8: QV4JRSEF

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/QV4JRSEFHMXEKBHXKUFCPARNVE \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 857898c8853b2e4504f7550a27822da9171115d50e2b8980fe3e9ed962ee118f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5bd3bbdcc36cbc050ac61a308c41e437c27566e983fadf202519ad78bfb6ec84",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-01-26T21:00:04Z",
    "title_canon_sha256": "b80b2bc041d2794ac6aea2e96c7927330cb6fefdf9176a7fa333c90ec8012dbf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1001.4795",
    "kind": "arxiv",
    "version": 1
  }
}